West Ham co-owner David Gold
The former Croatia manager will also have the Europa League to contend with should they come through a qualifying play-off against Romanian champions FC Astra - who knocked the Hammers out the competition last season.
West Ham manager Slaven Bilic
Hammers have made astute signings
West Ham have signed Norweigan midfielder Havard Nordveit, Algerian attacker Sofiane Feghouli, former Manchester United youngster Ashley Fletcher, Besiktas winger Gokhan Tore, forward Andre Ayew and left-back Arthur Masuaku this summer. Argentinian Jonathan Calleri will also arrive on loan subject to international clearance.
Meanwhile, Bilic sent back loan players Victor Moses, Emmanuel Emenike and Alex Song to their respective clubs while homegrown Hammer James Tomkins was sold to Crystal Palace for £10 million.
Gold with fellow Hammers co-owner David Sullivan
'We can still be very excited'
And while Bilic hinted he would like to make one more signing ahead of Monday's season opener at Chelsea, Hammers co-owner Gold suggested the club's business is done on whufc.com.
"It has been a long summer but I think the business we have done overall has been incredible and I have to pay tribute to David Sullivan, Slaven Bilic, Tony Henry and Andrew Pincher for all the hard work they have put in to ensure we have had a near perfect window," Gold said on the club's official site.
"There are number of top clubs across Europe who are looking to sign a striker who can score over 20 top flight goals a season, but when it comes down to it there are probably only ten forwards who can do that and all the top Clubs are chasing them.
"We can still be very excited over the signings we have made and our fans should not forget that we have made a club record signing and the arrival of Andre Ayew is a major coup for the football club."
Carlos Bacca was a marquee target
Could club live to regret not pushing the boat out?
With Andy Carroll threatening to be fitter than ever and the injured duo Manuel Lanzini and Gokhan Tore edging closer to their own comebacks from injury West Ham's squad suddenly looks deep and strong.
But even with Ayew, West Ham look decidedly one-dimensional with Carroll up front on his own and could well regret not pushing the boat out for a marquee striker come the winter.
Of course there are still over two weeks until the window slams shut and it could all be smoke and mirrors from Gold so Hammers fans must wait and see what September brings.